Signature MovesChameleon is most likely a part of the Saurian race, of which Reptile and Khameleon are members. This has never been conclusively stated in any of the games and is purely speculation on the part of the fans at this point due to his reptilian name, green blood, and the reptilian titles of his special moves in Armageddon. If, in fact, he is a Saurian, that would mean that Reptile is not the last living creature of his species, which had been previously stated in Khameleon's biography screen. However, the release of Armageddon did not address this issue.
In Mortal Kombat: Armageddon, he is finally given a rather vague backstory, stating that he had been present at events dating all the way back to Liu Kang's victory in the first Mortal Kombat tournament, constantly remaining hidden in the shadows and biding his time while watching the events unfold. In his game ending, it is said that Chameleon camouflaged himself, raced to the top of the pyramid, and defeated Blaze to gain immortality. The realms would then know Chameleon as the true champion of Mortal Kombat.
Green Wave (MK:A)
Lizard Lightning (MK:A)
Speedy Serpent (MK:A)
Vanishing Kick (MK:A)